/*
首先依次安装组件：
1. npm i cors
2. npm i body-parser
3. npm i multer
4. npm i mysql
 */
var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

// bodyParser 用来解析post数据
var bodyParser = require('body-parser');
// 总路由
var webRouters = require('./routes/webRouters');
/*
解除跨域，首先执行以下命令完成跨域组件安装
npm install cors
 */
var cors = require('cors');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'pug');

/*
解除跨域
 */
app.use(cors());

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

// bodyParse 用来解析post数据
app.use(bodyParser.urlencoded({extended:false}));
// 添加总路由
app.use('/', webRouters);

/*
添加swagger组件
 */
app.use('/v1/api', express.static('public/swagger'));
app.use('/swagger', function(req, res){
  res.write('You maybe access /v1/api');
  res.end();
});

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
